# Can MOTS-c mitigate myocardial ischemia-reperfusion injury in aging hearts?

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Peptide Longevity Q&A · 2026-01-28


    Research indicates that exogenous MOTS-c significantly reduces myocardial ischemia-reperfusion injury, with an optimal dose of 0.5 mg/kg leading to a 73% reduction in infarct size and improved cardiac function. These findings suggest potential cardioprotective effects relevant to aging hearts.

 What the research shows

The study focused on the cardioprotective effects of the mitochondrial-derived peptide MOTS-c in an ex vivo rat heart model of myocardial ischemia-reperfusion injury (MIRI). The researchers administered various doses of MOTS-c (0.25-0.7 mg/kg) during the first 10 minutes of reperfusion following a 30-minute global ischemia period. They measured hemodynamic parameters, infarct size using TTC staining, oxidative stress markers, inflammation, and apoptotic gene expression. Additionally, computational models were used to predict peptide-protein interactions with survival pathways.

 Why it matters for longevity

As the heart ages, it becomes more susceptible to ischemia-reperfusion injuries, which can lead to significant morbidity and mortality. The findings from this research suggest that MOTS-c may offer a protective effect against such injuries, potentially improving cardiac health and longevity. By enhancing cardiac function and reducing damage during ischemic events, MOTS-c may contribute to a healthier aging process, particularly in populations at risk for heart disease.

 Key findings at a glance

MOTS-c at 0.5 mg/kg reduced infarct size by 73% compared to ischemia-reperfusion alone.

Improved hemodynamic parameters, including heart rate and left ventricular developed pressure.

Decreased lactate dehydrogenase release by 65%, indicating reduced cellular damage.

Enhanced antioxidant defenses with increased levels of superoxide dismutase and catalase.

Downregulation of pro-apoptotic genes and upregulation of cytoprotective genes.

High-affinity interactions with critical survival pathways were demonstrated through molecular docking.

 How MOTS-c works (background)

MOTS-c is a peptide derived from mitochondria that plays a role in regulating metabolic and cellular stress responses. In the context of myocardial ischemia-reperfusion injury, it appears to exert cardioprotective effects by modulating apoptotic pathways, enhancing antioxidant defenses, and reducing inflammation. The peptide's interactions with key survival pathways, such as MAPK, mTOR, and AMPK, suggest a multifaceted mechanism that could be leveraged to protect heart tissue from ischemic damage.

 Safety, caveats, and what we don't yet know

While the study provides promising evidence for the cardioprotective effects of MOTS-c, it is important to note that the research was conducted in an isolated heart model, which may not fully replicate systemic influences present in living organisms. The study also utilized a limited range of doses, indicating that further research is necessary to establish the pharmacokinetics and optimal dosing for different populations. Broader studies are needed to assess the safety and efficacy of MOTS-c in humans, particularly in older adults who may benefit most from its protective effects.

 Bottom line

The research suggests that MOTS-c can significantly mitigate myocardial ischemia-reperfusion injury, particularly at an optimal dose of 0.5 mg/kg, indicating potential benefits for heart health in aging populations.

 Related questions

 How does MOTS-c influence metabolic aging?

Research indicates that MOTS-c may play a role in regulating metabolic processes, potentially improving insulin sensitivity and reducing metabolic aging effects.

 Can MOTS-c support tissue regeneration after injury?

Preclinical studies suggest that MOTS-c may enhance tissue regeneration by modulating apoptotic pathways and promoting cellular survival mechanisms.

 What are the potential benefits of MOTS-c for older adults?

MOTS-c may offer benefits for older adults by improving cardiac function and reducing the risk of ischemic injuries, thus contributing to overall healthspan.

 Source: PubMed · Naunyn Schmiedebergs Arch Pharmacol · published 2026-01-28.

## Sources

- PubMed · Naunyn Schmiedebergs Arch Pharmacol: https://pubmed.ncbi.nlm.nih.gov/41593376/